void main(List<String> args) {
  List companyList=["剧场剧团","零编码公司","OtO的餐饮","TOB","教育"];

  print(companyList);

  List numList=["",false,1,3,companyList,{}];

  print(numList);

   print("列表的长度:"+companyList.length.toString());

int index=3;
  print(companyList[index]);

  companyList.insert(0, "中软");
  companyList.add("123");
  companyList.addAll(["456","789"]);

  print(companyList);

  companyList.remove("中软");
  print(companyList);

  companyList.removeAt(companyList.length-1);

  print(companyList);

  companyList.forEach((item){
    print(item);
  });

}